GGT1 and neoplasm: As shown in Figure 8A, expression of GGT1 was negatively correlated with tumor purity (r = −0.236, P = 9.03e-6) and positively associated with infiltration of CD4+ T cells (r = 0.148, P = 6.11e-3), macrophages (r = 0.163, P = 2.54e-3), and dendritic cells (r = 0.116, P = 3.25e-2).